* Engine Mounts: The engine mounts on the 1996 318 and the 1993 van's frame may not be compatible. You'll likely need custom mounts or mounts from a different year of Ram truck or van that bridges the gap.
* Transmission: The transmission compatibility is crucial. You need to ensure the transmission from the 318 (likely an automatic) is compatible with the van's transmission bellhousing and the van's transfer case (if 4WD). You might need an adapter, a different transmission, or custom modifications.
* Wiring Harness: The 1996 engine's wiring harness is different from the 1993 van's. You'll need to either adapt the harness or wire everything individually, which is a significant undertaking. This includes sensors, computer, and all electrical connections.
* Computer/ECU: The 1996 engine's computer will likely not be compatible with the 1993 van's system. You might need to find a compatible computer, potentially requiring additional wiring and modifications.
* Exhaust System: The exhaust system will almost certainly need to be modified or replaced to fit the new engine.
* Cooling System: The cooling system may need adjustments to accommodate the 1996 engine.
In short: While not impossible, this engine swap is a complex project requiring significant mechanical expertise and potentially custom fabrication. It's not a simple bolt-in operation. You'll need a good understanding of automotive mechanics and likely access to specialized tools and equipment. It's far easier to find a used 318 engine and transmission assembly from a similar year Ram van.
